Interesting Thing of the Day: Vegetable Oil as Diesel Fuel

Interesting Thing of the Day: Vegetable Oil as Diesel Fuel: "The other day I was out for a walk in my neighborhood and I noticed an otherwise ordinary-looking pickup truck with a big sign on the back that said �This vehicle powered by 100% used vegetable oil.� That�s nice, I thought, very environmentally conscious and all�as San Franciscans are known to be. I wondered briefly about the technological issues involved in getting a truck to run on vegetable oil, information that surely would be available a few clicks away on the Web. But I also wondered about maintaining a fuel supply. If you�re on a trip and the fuel gauge starts getting low, a gas station would presumably do you no good. Do you start looking for a doughnut shop or a fast-food joint where you can score some used oil? Is there enough to go around? And will it really end up being less expensive than conventional diesel fuel?"